Umbra in partial lunar eclipses at moonrise
Costantino Sigismondi
TL;DR
This paper examines the darkness of the umbra during the August 7, 2017 lunar eclipse, comparing it to historical eclipses and discussing solar activity's influence on eclipse appearance.
Contribution
It provides an analysis of the 2017 lunar eclipse's umbra darkness and explores historical parallels and solar activity hypotheses.
Findings
The 2017 eclipse's darkness matched predictions for minimal solar activity.
Historical eclipse in 33 AD showed similar partial moonrise appearance.
Discussion of solar activity's impact on eclipse visibility.
Abstract
The darkness of the umbra of the lunar eclipse of August 7 2017 corresponded to the predictions of A. Danjon for the Sun at its minimum. It appeared partial at moonrise in Rome similarly to the one of April 3, 33 AD in Jerusalem, supposed following the Crucifixion of Christ. The hypothesis of Sun at maximum activity for that historical eclipse is discussed.
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Taxonomy
TopicsHistorical Astronomy and Related Studies · Solar and Space Plasma Dynamics